问题
单项选择题
对于采用直流G-M供电的电动-机械传动舵机，电动机M应使用何种类型（）。
A．重复短时工作制直流电动机
B．长期工作制直流电动机
C．三相异步电动机
D．单相异步电动机
答案
参考答案：A
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对于采用直流G-M供电的电动-机械传动舵机，电动机M应使用何种类型（）。
A．重复短时工作制直流电动机
B．长期工作制直流电动机
C．三相异步电动机
D．单相异步电动机
参考答案：A
I have a sister. My lifestyle is different from her. I 1 healthier than her. I exercise twice a day. Usually I come home from school 2 , though my home is 3 from school. It takes me more than one hour. And my eating 4 are better than hers. She often has a 5 , because she likes to eat unhealthy diet. 6 I don’t like milk, my mother wants me to drink it. She says it’s good for my health. So I have to drink it. I try to eat 7 vegetables ten to eleven times a week. I keep eating fruit every day. They help me to keep in good health. As 8 meat, I must try to eat less of it. Of course, I love junk food too. I try to eat it only 9 a week. I sleep for nine hours every night. 10 you see, my healthy lifestyle depends on good food and exercise. It helps me study better.
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